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What is obtained after simplifying (4x^2-3xy+2y^2+5xy-7y^2-x^2)?

Answer and explanation

Correct answer: \(3x^2+2xy-5y^2\)

Combine like terms: \(4x^2-x^2=3x^2\), \(-3xy+5xy=2xy\), and \(2y^2-7y^2=-5y^2\). Hence, the simplified expression is \(3x^2+2xy-5y^2\). Option B uses an incorrect coefficient for \(x^2\). Exam tip: add or subtract only terms having the same variables with the same powers.

Related tags

PolynomialsAlgebraic ExpressionsLike TermsSimplificationCoefficientsIntroduction To PolynomialsMathematicsClass 9 Mcq

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